from flask import abort, jsonify
from flask import current_app
from flask import g
from flask import render_template
from flask import request
from flask import session

from info import constants, db
from info.models import User, News, Comment, CommentLike
from info.modules.news import news_blu
from info.utils.common import user_login_data
from info.utils.response_code import RET

@news_blu.route('/comment_like',methods=["POST"])
@user_login_data
def comment_like():
    #评论点赞
    user=g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    #1取到参数
    comment_id=request.json.get("comment_id")
    news_id =request.json.get("news_id")
    action =request.json.get("action")
    #２校验参数
    if not all([comment_id,action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ["add","remove"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    try:
        comment_id=int(comment_id)
        # news_id =int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    #３取到要被点赞的评论模型
    try:
        comment=Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not comment:
        return jsonify(errno=RET.NODATA, errmsg="评论不存在")
    if action=="add":
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id,
                                                      CommentLike.comment_id == comment.id).first()
        if not comment_like_model:
            #点赞评论
            comment_like_model=CommentLike()
            comment_like_model.user_id = user.id
            comment_like_model.comment_id = comment.id
            db.session.add(comment_like_model)
            comment.like_count +=1
    else:
        #取消点赞评论
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id,
                                                      CommentLike.comment_id == comment.id).first()
        if comment_like_model:
            db.session.delete(comment_like_model)
            comment.like_count -= 1
    try:
        db.session.commit()
    except Exception as e:
        db.session.rollback()
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据库操作失败")

    return jsonify(errno=RET.OK, errmsg="OK")


@news_blu.route('/news_comment',methods=["POST"])
@user_login_data
def comment_news():
    #评论新闻或者回复某条新闻下指定的评论
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    #1取到请求参数
    news_id=request.json.get("news_id")
    comment_comment=request.json.get("comment")
    parent_id=request.json.get("parent_id")
    #2判断参数
    if not all([news_id,comment_comment]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    try:
        news_id=int(news_id)
        if parent_id:
            parent_id=int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    # 3查询新闻并判断新闻是否存在
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="为查询导数据")
    #3初始化评论模型并且赋值
    comment=Comment()
    comment.user_id=user.id
    comment.news_id=news.id
    comment.content=comment_comment
    if parent_id:
        comment.parent_id=parent_id
    #4添加到数据库
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
    return jsonify(errno=RET.OK, errmsg="OK",data=comment.to_dict())




@news_blu.route('/news_collect',methods=["POST"])
@user_login_data
def collect_news():
    #收藏参数　判断收藏

    user=g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    # 1接收参数

    news_id=request.json.get("news_id")
    action=request.json.get("action")
    #２判断参数
    if not ([news_id,action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    if action not in ["collect","cancel_collect"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    try:
        news_id=int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    #3查询新闻并判断新闻是否存在
    news=None
    try:
        news=News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="为查询导数据")

    #４收藏以及取消收藏
    if action=="cancel_collect":
        #取消收藏
        if news in user.collection_news:
            user.collection_news.remove(news)

    else:
        #收藏
        if news not in user.collection_news:
            #添加到用户收藏列表
            user.collection_news.append(news)

    return jsonify(errno=RET.OK, errmsg="操作成功")







@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):
    #查询用户登陆信息
    user=g.user
    # 新闻详情　：paran news_id
    # 右侧的新闻排序的逻辑　　对象列表不能放入
    #查询用户登陆信息
    # user_id = session.get("user_id", None)
    # user = None
    # if user_id:
    #     # 尝试查询用户的模型
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)

    #一条新闻的显示
    detail_news=None
    try:
        detail_news = News.query.filter(News.id == news_id).first()
    except Exception as e:
        current_app.logger.error(e)
    if not list:
        abort(404)
    #更新新闻数据     更新新闻的点击次数
    detail_news.clicks += 1

    #默认是点赞
    is_collected = False
    #判断用户是否收藏当前新闻　如果收藏
    #ｃｏｌｌｅｃｔｉｏｎ_ｎｅｗｓ后面不用加ａｌｌ　因为ｓｑｌ会在使用的时候自动加载
    if user:
        if detail_news in user.collection_news:
            is_collected=True


    # 右侧的新闻排行的逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    # 定义一个空的字典列表，里面装的就是字典
    news_dict_li = []
    # 遍历对象列表，将对象的字典添加到字典列表中
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    #去查询评论数据
    comments=[]
    try:
        comments=Comment.query.filter(Comment.news_id==news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)

    comment_like_ids=[]
    if g.user:
        try:
            # 需求：查询当前用户在当前新闻里面都点赞了哪些评论
            # 1. 查询出当前新闻的所有评论 ([COMMENT]) 取到所有的评论id  [1, 2, 3, 4, 5]
            comment_ids = [comment.id for comment in comments]
            # 2. 再查询当前评论中哪些评论被当前用户所点赞 （[CommentLike]）查询comment_id 在第1步的评论id列表内的所有数据 & CommentList.user_id = g.user.id
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),
                                                     CommentLike.user_id == g.user.id).all()
            # 3. 取到所有被点赞的评论id 第2步查询出来是一个 [CommentLike] --> [3, 5]
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]  # [3, 5]
        except Exception as e:
            current_app.logger.error(e)

    comment_dict_li=[]
    for comment in comments:
        comment_dict=comment.to_dict()
        #代表没有点赞
        comment_dict["is_like"]=False
        #判断当前便利到的评论是否被当前登陆用户所点赞
        if comment.id in comment_like_ids:
            comment_dict["is_like"]=True
        comment_dict_li.append(comment_dict)


    data={
        "user": user.to_dict() if user else None,
        "news": detail_news.to_dict(),
        "news_dict_li": news_dict_li,
        "is_collected":is_collected,
        "comments":comment_dict_li,
        "comment_like_ids":comment_like_ids
    }
    return render_template("news/detail.html",data=data)


